Can a landlord file for eviction before the lease agreement for late payments date?

You can reinstate by paying the back rent. Call the LL to arrange this, it saves them legal fees, tell them your plan and ask to work with them. Should work. If you do have to go to court, tell the judge the situation and ask them to allow you to catch up on rent, explain what happened and your repayment plan; if the landlord is getting paid in full, the court will be very sympathetic to your situation.   good luck if there is a problem, get legal help. many courts offer free legal aid; those lawyers will easily be able to help you.