Errata to the paper T.H. Koornwinder and M. Mazzocco, Dualities in the $q$-Askey scheme and degenerate DAHA, Studies Appl. Math. 141 (2018), 424-473; arXiv:1803.02775v3 [math.CA]. Last mocdified: 25 July 2024. On the second line after formula (16) replace "This system is uniquely solvable" by "This system is uniquely solvable except if $e_4=q^2$. On the third line of Remark 11 in subsection 5.1 replace (-k_1 u_1^{-1}, k_1 u_1, q^{1/2} k_0 u_0^{-1}, -q^{1/2} k_0 u_0) by (-k_1 u_1^{-1}, k_1 u_1, -q^{1/2} k_0 u_0^{-1}, q^{1/2} k_0 u_0) On the line above formula (98) replace "(1-q^n)E_{n-1}" by "(1-q^n)R_{n-1}". On p.450 in the journal version or on p.25 in the arXiv version replace in the last line before subsection 5.5 $qa,b,c,d$ by $q\tilde a,\tilde b,\tilde c,\tilde d$.