What should I claim to get the maximum federal taken out of my paycheck

Why?

To maximize the Federal taxes withheld from your paychecks, you should claim Single on your form W-4, claim 0 dependents and 0 deductions.

You can also choose to have an extra amount of Federal taxes withheld from each of your paychecks (on top of the amount from the Federal withholding tables) by entering a dollar amount on line 4(c) of your form W-4.

I don't want to pay in at the end of the year

In 2020, W4's were completely redesigned.  My suggestion is to use the IRS Tax Withholding Estimator here, to determine what needs to be withheld.