Your greytHR Starter Plan account is free for life, and you can process payroll for your business for many, many years. However, you can get information and reports for only the past 13 months. You will not have access to data for earlier months.
Of course, you can download detailed payroll data and salary statements for each of the months on your local system and ensure access to all historical data.
In the paid plans, such a restriction does not exist.