I agree as others, cut all ties.
Parents who have been long-term JW's will often not be as concerned with their adult child's 'official' status as they are with the fact they are not attending meetings. Non-attendance often becomes evident fairly quickly as social visits typically resort to discussions of JW topics and a non-attendee will often not fully understand what is being mentioned or respond as appropriate. This can cause the devout parents to begin to question the adult child and limit association.
If you are adamant to transfer your file to another cong, you could choose a congregation some distance away from where you actually live. Attend only a few times under the premise that you were relocated there by your employer or you obtained a new job in the area. Due to training for your new position, your meeting attendance may not be regular initially, but that will change once training has completed. If asked to provide an address, you could claim you are currently at a temporary location until a suitable permanent residence is found.
Once your records are transferred, ask the new elders to forward your records to a different nearby congregation as you will soon be moving to a permanent address within that congregation's territory. If they do forward your file, those elders will soon forget about you, and the 'new' congregation won't know who you are as they have never even met you. Since both congregations are located a substantial distance from where you actually live and as no members have seen much of you, there is little expectation anyone will remember you even if you ever did run into them elsewhere.