In Glasgow, if you believe you've been unfairly dismissed, you typically have three months from your dismissal date to submit a claim to an employment tribunal. It's essential to gather evidence, such as your contract, dismissal letters, and any relevant communications. You may also want to seek advice from a solicitor who specialises in employment law to assess the strength of your case and guide you through the process. Additionally, you can check resources on the official gov.uk website for further information on unfair dismissal claims.