No one will be filing a 2020 tax return until tax year 2020 ends after December 31, 2020. In 2021 taxpayers will begin to prepare and file 2020 tax returns--not before.
You may be confused about how the tax years work, or you are confused about paying quarterly estimated tax since you are an independent contractor. You do not file a tax return for 2020 at this time. You might need or want to pay some estimated tax for 2020. You can do that on the IRS site or you can print and mail a 1040ES with a check or money order.
https://ttlc.intuit.com/questions/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs
https://ttlc.intuit.com/community/self-employed/help/what-is-the-self-employment-tax/00/25922
https://ttlc.intuit.com/questions/2902389-why-am-i-paying-self-employment-tax
https://ttlc.intuit.com/questions/2903027-how-do-i-report-income-from-self-employment
https://www.calcxml.com/calculators/self-employment-tax-calculator (non-TT site)
https://www.irs.gov/payments/direct-pay
https://www.irs.gov/pub/irs-pdf/f1040es.pdf
https://ttlc.intuit.com/questions/3398950-what-self-employed-expenses-can-i-deduct
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
