The Republican-backed tax package, passed by a GOP-controlled Congress, has been credited with increasing tax refunds and reducing the tax burden on millions of families and small business owners. According to Republicans, average tax refunds this year rose 11 percent to more than $3,400. The law also included provisions eliminating taxes on overtime pay, tips, and Social Security benefits for millions of Americans. Republicans say roughly 25 million taxpayers benefited from the overtime provision, six million from the tax break on tips, and 27 million from the Social Security tax relief.

The measure also provided tax reductions for small business owners, who reportedly saw average savings of about $7,000. In addition, families with qualifying newborn children are eligible for government-funded Trump Accounts designed to help establish long-term financial security.

To mark the anniversary, the National Republican Congressional Committee launched a new advertising campaign touting the tax cuts as proof that Republican economic policies are delivering results. The group is also reminding voters that every House Democrat voted against the legislation.

Democrats, meanwhile, have criticized the law and some have called for its repeal. Republicans argue that repealing the measure would increase taxes and household costs. As the fight for control of the House intensifies, Republicans are hoping voters remember the tax relief they received over the past year when they head to the polls.