I did that and there is no ability to change. The portal states the last four of social for bank info.
However when I text my balance for my turbocard I get my balance and it includes my stimulus balance. So it appears its working for some and not others.
Also note I did take the advance as well from TT. 83854 is the number I text. It replied for me to text last four of my card.
App and website still down .
