Ch13 and part time seasonal work

I just paid off my lawyer and getting ready to file for ch13. I am currently waiting for my new accountant to file my business and personal tax returns for 2025 (small business owner and have an extension). I make around 42k a year. My business usually slows down over winter and my pay will stay the same or slightly decrease. I usually work from October through December at UPS for seasonal work. This is about $600 weekly after taxes.

My question is if I file before October, would they have to adjust my income for those 3 months then adjust it again? Would that affect how much I owe temporarily?

Or could I cut my pay at my own business and just take UPS pay to balance it out? The business is slowing with the economy as well so it's always a survival game.