11 common tax mistakes that could be costing you thousands, from using the wrong filing status to missing out on potential deductions

This year's tax filing deadline falls on April 15, 2019.Some easily avoided tax mistakes can end up costing you thousands.Common errors people make include using the wrong filing status and forgetting to report earnings from a side gig.Using an online system or accountant may not be a fail-proof system either.It's tax season, which brings with it a flurry of anxieties for many Americans worried about doing their taxes wrong.It's a valid concern; about half of Americans don't know what tax bracket they fall into, for instance, according to a study from Nerdwallet. Many people aren't sure of what changed after the passage of the Tax Cuts and Jobs Act in 2017, and nearly half (48%) don't know how it affects their own tax bracket, Nerdwallet's 2019 tax study found.But educating yourself on taxes can both save you money and help you avoid any trouble with the Internal Revenue Service (IRS). Here are some of the most common blunders experts say you should watch out for when filing your taxes this year.