A last-minute assurance on a critical tax deduction and the promise of a future vote on fiscal restraint will help ensure House passage of a budget resolution on Thursday, which could put the GOP in a position to pass tax reform this year.

Republican leaders late Wednesday appeared confident they will pass the Senate’s $4 trillion budget resolution. The spending blueprint has significant differences from a plan authored by the House, but it includes room for a $1.5 trillion tax cut that Republicans are desperate to advance as part of a legislative tax overhaul.