You have a 90 day window to do your escrow analysis.
For each escrow account, a servicer shall submit an annual escrow account statement to the borrower within 30 days of the completion of the escrow account computation year. The servicer shall also submit to the borrower the previous year's projection or initial escrow account statement. The servicer shall conduct an escrow account analysis before submitting an annual escrow account statement to the borrower. [§1024.17(i)]
In preparing the statement, the servicer may assume scheduled payments and disbursements will be made for the final 2 months of the escrow account computation year. [§1024.17(i)(1)]
As long as you complete your annual analysis by the end of February, you're okay.