I've never needed to do estimated tax before. This seems like a really basic question, but I can't quite seem to get an answer from the instructions ...
I know the payments need to be made quarterly and "on time" (basically within 15 days of quarter's end).
But must they (or can they) be four EQUAL payments, regardless of how income is spread out during the year ? For example, if most of my income occurs in the first quarter (for example, a big consulting contract), is it ok to spread my estimated tax payments into 4 equal installments, one each quarter ? What about the flip side, where one gets a big income the LAST quarter of the year, and had no way of knowing the three earlier quarters' payments needed to be larger ?
Thanks, John