IT is a very broad term. Are you looking for coding, system administration, application support, network administration, security?
I started in desktop support/help desk, then moved to server admin. I found that I did not like that and moved to network engineering and lived there for quite a few years. I now work security and bring a unique set of skills because I understand so many aspects of IT from the operations side that translate to security. I have roughly 6 credits and make a nice salary. Most of the jobs that I have had in the last 15 years listed a BS as a requirement.
As a hiring manager, I am looking to fix a business problem. I need to hire someone to do X due to Y and Z business requirements. Most good managers are not only looking for specific hard skills, but soft skills. This is were you play up how your soft skills from accounting can transfer to IT. You can have a generic resume on LinkedIn, but you will need to tailor your resume for each job you apply for.
Let's say you are looking at a positions for entry level security analyst. First, you should go get an entry level security certification. This will show that you are serious about the career change and that you have a basic understanding of security. Your multiple degrees already show that you are trainable. Play up your soft skills such as time management, how you dealt with a difficult situation, how you went above and beyond. Word this not as how it helped with accounting, but how it helped the business.
Most security positions will mention some sort of GRC. You might not know the ins and outs of HIPAA or PCI, but you do understand compliance and what happens when you run afoul of it. Show that you are able to look at a set of data and validate if it meets the framework. Read a few security analyst postings and find some of the top GRC requirement and at least know what they are trying to do. For instance, if you see PCI you should immediately think credit card payments. HIPAA, you should immediately think healthcare.
Other than some entry level certs, I don't think you need to go back to school. I do think you need to show how your current skills can transfer to an IT position and tailor your resume for what that specific job is requesting.