This doesn't apply if you're using TT online and this might not matter much because I haven't seen it myself but if you're using TT software, wait until April to send in. TT is always updating their software and there is no telling if they are updating to fix programming calculations.

We typically get a refund from the feds and have to pay CT but this year is unusual for us, we're getting a sizeable refund from CT along with a fed refund. Not sure why this year is different but I will wait until April to let things level off with TT software before sending in.