Yes you can transfer your RRSP to your FSHA tax fee. These transfers are subject to FSHA annual and lifetime contribution limits. Such transfers are not deductible and do not restore your RRSP contribution room.

Any funds withdrawn from your FHSA which are not used to purchase a qualifying home are subject to income tax. Alternatively, the balance in your FHSA which is not being used to purchase a qualifying home can be transferred into an RRSP or RRIF on a non-taxable transfer.

Eligibility hinges on being a first-time homebuyer and a current resident of Canada at the time of withdrawal for the purchase of your eligible home.  A "qualifying home" is characterized as a residential unit situated within Canada. This designation extends to encompass a portion of the capital stock in a cooperative housing corporation, provided that the shareholder holds the right to occupy a residential unit located in Canada.  An additional requirement is to possess a documented agreement for the purchase or construction of a qualifying home in Canada by October 1 of the year following the withdrawal year. Additionally, you should have the intention to make the qualifying home your primary residence within one year of either purchasing or constructing it.