Best Answer - Chosen by Voters
Your N+1 will usually apply to hydrogen, but when it comes to the number of peaks, there probably is no limit. For instance, coupling from sulfur or phosphorous atoms results in a tremendous amount of complexity.
Then, you can get long range coupling through double bonds, that will give coupling.
At your probable level, just consider the N+1 as a general guide in the absence of other complications.
But realize that in a publication, there are reasons that a ppm range is given, with the description of multiplet.