Hi,
As you have been living and working abroad, you should read the leaflet NI38 which explains about paying for shortfalls in National Insurance whilst abroad. You can find this here:
Social Security abroad: NI38
If you then decide you wish to find out your shortfall years, you should complete and send the CF83 application form and tick the box for shortfall years info.
If you are applying for Class2 shortfall advice, please include a covering letter with your periods of employment and, or, self employment abroad. Although HMRC can advise what years you may be able to pay for, we cannot confirm if these will benefit your pension forecast. You will need to contact Future Pension Centre to discuss which years, if any, will be beneficial to pay to increase your basic State Pension.
Contact the Future Pension Centre
Thank you.