The IRS announced Friday that most relief checks issued by states last year aren’t subject to federal taxes, providing 11th hour guidance as tax returns start to pour in. A week after telling payment recipients to delay filing returns, the IRS said it won’t challenge the taxability of payments related to general welfare and disaster, meaning taxpayers who received those checks won’t have to pay federal taxes on those payments. All told, the IRS said special payments were made by 21 states in...