Hello! I have some investment and self-employment income so I usually need to pay estimated taxes. I like to make the 100/110% previous year safe harbor quarterly payments, since I don't know what my income will be, and would rather not try to calculate each quarter. (Once a year is bad enough!)
Last year, I moved into North Carolina from another state, so I was only here about a quarter of the year. This year I plan to be a full-year resident.
The 2019 NC D-422 form says "Your 2018 tax return must cover a 12-month period" for the 100% prior year safe harbor option. Does that mean the only safe harbor available to me is to pay 90% of current year tax? Or can I extrapolate the prior year amount somehow -- maybe assuming same rate for whole prior year, or recalculating prior year taxes as if I were a whole year resident?
Edit: I just noticed the comparable federal instructions say the same thing about a 12-month period, so if anyone knows how a shorter year is handled federally, maybe it would be the same for NC.
