As Tinuviel says, education and welfare are supposed to be entirely separate. (Personally I think the two are inextricably linked, but never mind!)
You may have heard of families whose home education triggered someone to contact Social Services. This is often malicious; for example school staff may be trying to pin the blame for the child's unhappy school experiences on the family. But SS tends to see right through this ploy, and such cases are usually open-and-shut. After all, if the school had genuine concerns about the child's home life then they would have reported it immediately rather than waiting until the child leaves school!
Your LA is very likely to get in touch to ask you to provide information about your child's home education. Depending how honest your LA is, they may or may not tell you that providing this information is entirely optional and that you do not have to allow a home visit. Most HE parents feel that it is advisable to provide some information if asked, to avoid future hassle, but this can be in a format of your choice.
Being well clued-up about all this (I'd home educated for years before my dd went to school briefly), I found my interaction with the LA annoying, as they lied to me. I put in a complaint, whereupon they denied ever having told me that a home visit was a legal requirement. After some assertive letters from me, they have finally stopped writing to me about my older child, and they don't know the younger one exists!
When they do get in touch, feel free to post here to ask whether you have to do what they are asking you to do. In the meantime you might think about what you would ideally like. Do you think you would enjoy a home visit, for example?