would you use the variable option and put in 1 year since it asks for a year
Yes.
When a covered loan’s term to maturity (or, for a variable-rate transaction, the initial fixed-rate period) is not in whole years, the financial institution uses the number of whole years closest to the actual loan term or, if the actual loan term is exactly halfway between two whole years, by using the shorter loan term. There is an exception for a loan term shorter than six months (including variable-rate covered loans with no initial, fixed-rate periods), which should be rounded to 1.
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The opinions expressed are mine and they are not to be taken as legal advice.