I agree with the response from Attorney McElroy. As an aside, the moratorium imposed by Governor Wolf only applies to non-payment of rent. In other...

How can I get out my lease?

The very short answer is you may not able to. It sounds like you have a written lease agreement, so the answer to your question, and the potential...

I am not aware of any free resources that I can direct you to. The path to dissolution is an involved process, particulalry if you are a 501(c)(3),...

Unless the lease specifically says something different, the notice could be sent by the landlord's attorney as their representative.