I was planning on picking up some star wars Lego tonight and since I don't currently have the TRU cc I was going to open one tonight. my question is will I receive 15% off my purchase tonight for opening the card? 

Yes, I remember receiving mine immediately upon approval

Not sure if this is new but decrease from 15% to 10% 

Stores in the following zip codes will have a different account opening discount of 10%:

AK: 99515.
AL: 35226, 35243, 35401, 35806, 36109, 36303, 36606 and 36608.
AR: 72117, 72205, 72211, 72701 and 72903.
AZ: 85022, 85032, 85044, 85054, 85206, 85209, 85226, 85250, 85308, 85365 and 85395.
CA: 90035, 90039, 90201, 90230, 90250, 90503, 90640, 90701, 90703, 90740, 91016, 91302, 91326, 91350, 91360, 91367, 91381, 91402, 91406, 91502, 91709, 91748, 91764, 91784, 91790, 91802, 91911, 91941, 91942, 91950, 92029, 92054, 92083, 92110, 92203, 92231, 92374, 92392, 92505, 92507, 92562, 92647, 92683, 92691, 92821, 92832, 92881, 93004, 93030, 93277, 93309, 93312, 93534, 93611, 93650, 93711, 93906, 93907, 94063, 94087, 94404, 94513, 94523, 94538, 94541, 94564, 94565, 94568, 94587, 94591, 94901, 95065, 95123, 95125, 95210, 95219, 95350, 95356, 95407, 95610, 95624, 95630, 95678, 95815, 95991, 92126, 93065, 94014, 94533 and 94608.
CO: 80012, 80023, 80030, 80031, 80112, 80123, 80130, 80525 and 80909.
CT: 06040, 06110, 06111, 06385, 06460, 06473 and 06706.
DE: 19702, 19713 and 19901.
FL: 32073, 32244, 32246, 32301, 32401, 32504, 33012, 33026, 33067, 33143, 33157, 33162, 33165, 33172, 33180, 33183, 33196, 33319, 33324, 33410, 33414, 33428, 33435, 33511, 33544, 33614, 33710, 33761, 33765, 33809, 33907, 34109, 34207, 34668, 34957 and 33913.
***: 30022, 30058, 30096, 30135, 30144, 30165, 30214, 30252, 30264, 30338, 30339, 30519, 30606, 31602 and 31707.
HI: 96701 and 96782.
IA: 50315, 50322, 50325, 51501 and 52806.
ID: 83401.
IL: 60031, 60035, 60061, 60102, 60108, 60160, 60173, 60177, 60431, 60435, 60443, 60459, 60462, 60504, 60515, 60516, 60540, 60546, 60618, 60714, 61108, 61265, 61701, 61820, 62208, 62704, 62711, 62959 and 60707.
IN: 46227, 46229, 46240, 46250, 46410, 46530, 46545, 47304 and 47715.
KS: 66061, 66214, 66223, 66614, 67207 and 67209.
KY: 40503, 40509 and 42001.
LA: 70506, 70607, 70809, 71111 and 71201.
MA: 01040, 01129, 01453, 01501, 01527, 01532, 01701, 01801, 01960, 02019, 02026, 02149, 02184, 02364, 02401, 02601, 02747, 02760 and 02777.
MD: 20601, 20603, 20735, 20877, 20904, 21014, 21045, 21061, 21117, 21122, 21237, 21401, 21701, 21740, 21804 and 21286.
MI: 48059, 48066, 48071, 48104, 48124, 48152, 48167, 48180, 48185, 48195, 48197, 48313, 48341, 48359, 48377, 48507, 48603, 48604, 49002, 49024, 49444, 49512 and 49544.
MN: 55109, 55305, 55337, 55369, 55423, 55434 and 55125.
MO: 63005, 63042, 63127, 63129, 63376, 63701, 64055, 64118, 64155, 64802 and 65804.
MS: 38803, 39211, 39232, 39301 and 39402.
MT: 59102.
NC: 27511, 27616, 27707, 27834, 28303, 28546, 28803, 28806 and 27713.
ND: 58102.
NE: 68144 and 68521.
NH: 03060, 03063, 03079, 03103, 03301 and 03801.
NJ: 08002, 08016, 08034, 08096, 08330, 08360, 08540 and 08648.
NM: 87110, 87114 and 87123.
NV: 89014, 89084, 89107, 89108, 89118 and 89119.
NY: 12065, 12110, 12205, 12804, 14219, 14221, 14226, 14228, 14623, 14626 and 14845.
OH: 43017, 43056, 43068, 43232, 43235, 43240, 43528, 43614, 43623, 44035, 44060, 44070, 44124, 44129, 44221, 44446, 44512, 44514, 44718, 44720, 44870, 44906, 45431 and 45459.
OK: 73072, 73118, 73134, 73149, 74108 and 74133.
OR: 97015, 97217, 97223, 97266, 97301 and 97504.
PA: 15061, 15122, 15146, 15205, 15237, 15301, 15601, 15904, 16066, 16509, 16602, 17050, 17112, 17408, 17601, 17756, 18052, 18508, 18702, 18936, 19020, 19030, 19044, 19047, 19063, 19064, 19134, 19148, 19149, 19154, 19341, 19406, 19454, 19610 and 15102.
RI: 02886.
SC: 29212, 29301, 29501, 29577, 29607 and 29621.
SD: 57106 and 57701.
TN: 37421, 37601, 37919, 37922, 38125, 38133 and 38305.
TX: 75002, 75034, 75040, 75063, 75067, 75104, 75150, 75231, 75240, 75604, 75701, 76015, 76053, 76092, 76108, 76132, 76308, 76541, 76710, 77024, 77054, 77057, 77064, 77090, 77338, 77380, 77449, 77478, 77479, 77494, 77505, 77521, 77546, 77598, 77708, 77845, 78154, 78216, 78245, 78257, 78412, 78501, 78502, 78704, 78745, 78753, 78759, 79124 and 79414.
UT: 84041, 84047, 84058, 84107, 84119 and 84405.
VA: 20110, 20151, 20164, 22030, 22041, 22192, 22194, 22315, 22404, 22601, 22901, 23112, 23235, 23238, 23320, 23321, 23452, 23502, 23602, 23834, 24018, 24502 and 24541.
VT: 05495.
WA: 98004, 98036, 98037, 98188, 98208, 98373, 98383, 98409, 98502, 98903 and 99336.
WI: 53005, 53221, 53223, 53406, 53546, 53704, 53719, 54303, 54650, 54913 and 53045.
WV: 25309, 25504, 26105 and 26330.