Mark the final track
Select the track, then Track > Mission details. You can also open Track progress > Mission details / final track. Choose its contract, check Final track of this contract, and Save mission details. Only one track per contract can have this designation. Clear the old designation before choosing another track.
The flag can be changed while the contract remains unpaid, including when player rosters are locked. Standalone missions cannot be final contract tracks. Paid contracts lock these mission details.
Finish the track and contract
Complete the normal results steps, including salvage, then Finalize results. For a final track, the app opens Complete contract automatically. The finalized report and Track menu retain a Complete contract / receipt link so you can return later.
Review the contract result, each company's completion bonus and eligible paid repair expenses, then confirm Complete contract and pay out. This ends the contract for its participating companies, posts settlement once, and enters the between-contract phase for the current campaign contract. The campaign stays on its current planet.
Marking a final track does not itself close the contract, post money, change negotiated terms, or publish prepared markets. A designated final track must have finalized results before the contract can be paid out.