Same thing happened to me. Turbotax said I was getting $1348 back, but only $281 was deposited into the bank. Also it took nearly 6 months!!! I called the IRS and they said that it is an error on TurboTax' end, because they are asking for our stimulus check amounts, but then adding it in automatically too, so they are basically taking out the additional "stimulus" amount from our refunds. IRS said to file a complaint with TurboTax, but I have yet to find a way to do this. We will not be filing with TurboTax again.
