Wiggle Room

I agree with Dan's comments, but really wouldn't recommend exceeding the 60-day window between the end of your performance period and the application submittal. GBCI is becoming increasingly lenient on many things that used to be hard and fast rules for reviewers, so chance are, you'll be able to squeak an extra few days past the allotted time. However, the reviewer has the discretion to push back if they feel that you have not adequately justified going over the allotted time. My recommendation - try your best to work on documentation throughout your entire project and be prepared to submit within 60 calendar days of the end of your performance period.

An alternate strategy to consider (in case something unexpected comes up to delay your submittal) is to take another look at all of the credit-by-credit performance period ending dates. Remember that you must end all credits within a shared 30-day window - this is a requirement, but it may also give you a little more wiggle room to covertly extend the amount of time you have to finish up your submittal. If you extend your performance period for one or more credits by a few weeks, you'll still be ending all credits within the shared 30-day window and it'll give you more time to finish up the documentation that is giving you trouble. Try to pick credits that won't create additional work for you when you extend their performance periods, like SSc4, MRc6, or IEQc2.2. On paper, there will still be 60 days between the latest ending date of your performance period, but in practice, you can buy yourself another few weeks to finish everything up.