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I don’t have any carry over items but will owe for 2019. So I should file the 2019 first and mail it in and wait for processing before filing the 2020 electronically ? I have heard irs is very behind and may not get to the paper return for close to a year (not sure if this is true ). I will have a refund for 2020- so was trying to offset the 2019 tax due by 2020 refund that I will have . I’m trying to make this as seamless as possible being there IRS is very slow . Thank you for replying ! Someone else had advised me to start with the current year first and work back - to minimize the delays but I think this makes more sense . I appreciate your time !