You're going to want to spend some time with an accountant to walk you through your filing obligations. It sounds like you're referring to the filing of your quarterly withholding taxes for self employment purposes. These can easily be confused with the annual corporate or personal filing obligations for first time LLC owners. Best of luck with your new business.See question
Your answer depends on what provision of the charter that you are amending - whether it's a change to the address of the principal office or the number of directors.See question
I think that you'll have better luck asking this question in the criminal defense section.See question
You will definitely want to save the invoices and payment receipts for this expense, and provide them to your accountant this tax season. He/she will be able to review them and let you know whether or not the expense is deductible.See question
Maryland law requires each LLC to have a principal office in the State of Maryland, which must be a physical address (not a P.O. Box). If your virtual office service provides you with a physical address, then SDAT would deem it to be acceptable.
You'll also need a Maryland resident agent to accept service of process and official papers on behalf of the LLC. There are several commercial services and attorneys that provide this service to their customers/client at nominal annual costs.See question