When is the latest i can file taxes

So after this year‘s done will be the first full year I was self-employed and  the company I was doing business with sent all of my information to intuit QuickBooks. I’ll say I have made about 18000 once the year is complete I live in  Georgia. What do you estimate the amount I will have to pay in taxes if I’m single I didn’t do any withholdings or anything ,and also what is the latest I can pay as in when are they due by? because Unfortunately I didn’t save and I’m probably going to want to earn at the top of the first quarter (of 2025) what I’m going to have to pay for this entire year of earnings (4 quarters of 2024) . thank you