With your qualifications and experience, it sounds like your prospects should be good! It's often easier to get hired when you already have another job, so taking a job at H&R block might be beneficial. You may even be able to get a job with them in the off season if you have a strong tax background.
In the meantime though, provided you have a visa now and can work, there's no reason why you can't start your job search. Spruce up your resume, and start applying to jobs. Find out if there are any recruiting agencies in your area that specialize in accounting positions. Sign up for LinkedIn if you haven't already, and connect with your former co-workers and local people you know to let them know you're looking for a new job. Go to any local events for accounting professionals, and introduce yourself to others- you never know who might be hiring!
Good luck with the search, I hope you find the perfect job!