If you're an EU citizen living in the UK you will need to apply for settled status by 30 June 2021.
Please visit https://www.gov.uk/eusettledstatus to find out who is eligible to apply for settled or pre-settled status. There is no fee for this.
If you're unclear about the Government guidance or whether this applies to you, please obtain your own independent legal advice, or contact the Citizens Advice Bureau.