Alternate plan: start over.
Assuming, you going to start your new joint return by transferring one of your old returns: go to assets and delete the house (assuming that was your only asset). Then enter the house as a new asset, using the original basis and start date and 100% joint ownership. TurboTax (TT) will automatically calculate the previous depreciation taken. If it does not come up with the exact amount, you two claimed, you are given a chance to change it.
