Police have fined a 28-year-old woman for failing to isolate at home after returning to Tasmania from an interstate trip.

The woman, who arrived in north-west Tasmania from Western Australia on Sunday, was directed to isolate at her residence for 14 days upon her return.

Tasmania Police identified the breach during a routine compliance check on Tuesday, finding the woman had visited two retail outlets in Burnie that morning when she should have been at home.

Police say that she has been issued a fine of $774 for this offence.

The Police continue to actively monitor people who are required to self-isolate at home; they have clocked up more than 22,000 checks conducted since 25 March when procedures were put in place.

Non-compliance with self-isolation requirements or other restrictions can be reported here.